A new, two-stage water-purification system that relies nanotechnology could deliver clean water to rural areas at low cost. Researchers at the Indian Institute of Technology Madras in Chennai, India, developed the system to remove arsenic, pesticides, lead and other contaminants from the water. It's being tested in India and could provide a family with nearly 3 gallons of water a day for less than $3 per year.
Water-purification system uses nanotech to provide clean water
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